Paul h



(Model.)

P.-H. GR-nvuvx.

INJBCTOR BLOWER.

Patented rJuly 31, 1883.

fave@ UNITED STATES PATENT EEIOE.

PAUL H. GRIMM,

OE GLEN OOvE, NEW YORK, AssiGNoR OE ONE-HALE 'ro JOHN DURYEA, OE SAMEPLACE.

lNJECTOR-BLOWER.

sPEcrEIcA'rIoN forming para of Letters Patent No. 282,074, dated Julye1, 1883.

Application filed May 3.1883. (Model.)

T0 all whom it may concer/z Be it known that I, PAUL H. GRIMM, a citizenof the United States, residing at Glen Cove, in the county of Queens andState of New York, have invented certain new and useful Improvements inInj ector-Blowers, of which the following is a specification referencebeing had therein to the accompanying drawings.

My invention relates to the construction of an inj ector-blower orexhaust wherein a column of air or gas is propelled or projected by thepressure of j ets of steam or compressed air 5 and its object is toforce or project a current of air in a given direction with as littleexpenditure of steam-power and with as little admiXture of steam withthe air or gas as practicable.

The novel features of my invention will be hereinafter described andclaimed.

In the drawings, Figure lis a side elevation of my device. Fig. 2 is asectional elevation, and Fig. 3 is a detail. A

A represents the casing of my air-injector. This casingis preferablycast in one piece for convenience of construction. The casing has abell-mouthed air-inlet, a, a bell-mouthed outlet-passage, b, and acombining-chamber, c, between the narrowed portions d d of the casing.

Surrounding the casing, at about the middle in the construction shown,there is an annular chamber, e. The steam in the annular chamber eshould be as nearly at boiler-pressure as possiA ble. This may bemaintained by leaving` the pipe Z, which connects to the boiler, quiteunobstructed, and by making said pipe of sufficient size.

A series of nozzles or jet-pipes, f, are placed in thebottom of chambere. These pipes or nozzles incline toward the center of thecombiningchamber c, as shown in Fig. 2, and any suitable number may beemployed. They should be arranged at equal distances, so as to entirelysurround the combining-chamber c. I have found six of these jet-nozzlesto serve a good purpose, but do not limit myself to that number. Eachnozzle is provided with a valve, t, which may be raised'and lowered bymeans of screw-shaft g, which works steam-tight in stuffing-box k. Thisbox may screw into the upper part of the steam-chamber e, as at Z Z,Fig. 2. Other suit able and convenient modes of operating the 5o valveswith relation to the nozzles may be used. The valves z' are conical, andcan be screwed down steam-tight into the conical valve-seats of thenozzles j'. .Y

My improved inj ector-blower is adapted for 5 5.

any of the uses for which the fan-blower has been designe( .-a '5, forinstance, the conveyance of an air-blast to a furnace, the exhaust ofgas' from mines, theventilation of buildings or ships, the propulsion ofgrain, feed, shavings, &c., in 6o a chute or conveyor, and for otherpurposes.

' The mode of Operation is as follows: The blower is placed with thebell-mouth b in proximity to the furnace or other place into which it isdesired to introducea current of air. Steam 65 being admitted to chambere, preferably athigh pressure, the valves are Opened and steam rushesthrough the nozzles f toward the center ofthe combiningchamber c. Thisinrush of steam causes a rapid inflow of air through the 7o bell-mouthedpassage a and into the chamber c, where air and steam are intinmtelymixed. The compression of the mixed air and steam as it passes throughthe narrowedthroat d causes it to fiow outward through the bell-mou th bwith 7 5 increased velocity. By means of the valves i, operated byvalve-rods g, as shown, the nozzlesf may be opened more or less toregulate the iiow of steam through said nozzles. The valves on one sidemay be opened more than 8O those on the other to give the blast adeinite direction, or the alternate valves may be opened differentdistances, so that steam may flow freely through one set ofp Orts andbewire-drawn7 through another set, thus producing an inti- S5 matecommingling of the steam and air by reason of cross-currents anddifferent velocities. The enlarged area of the combining-chamber givesspace for the admixture of the steam from the jets with the inrushingair-currents, 9o while theinclination of the jet-pipes toward the centerof this chamber gives such direction to the impinging currents as willcause them to move rapidly vthrough the outiioworice.

It is apparent that the device may be Oper- '9 5 ated by theintroduction of compressed air into the chamber e instead of steam, sothat the de vice would become entirely an air-injector.

@geen The peculiar form 'ol' the bell-mouthed outiioW-pipes, with theintermediate combiningchamber of greater sectional area than theoutiioW-tube, gives great advantage toV this form of injector-blower,the friction of passing currents on the tube being slight.

That I claim isl. An air-injector consisting, essentially, of aniniioW-pipe, a bell-mouthed outflow-pipe, an enlarged interveningcombining-chamber, j et-nozzles leading into the combiningchamber, andindependent means for closing each of said nozzles, substantially asdescribed.

2. The combination, with the ini-low and outioW pipes, the intermediatecombiningchamber, and the annular steam-chamber, of a series of steam-jet nozzles, as f, arranged at approXimately equal distances ap art inthe steamchamber, and inclined toward the center of the combmingchamber,substantiallyT as shown.

3. The combination, with the injector-pipe having bell-mouthed ends, asa b, and intermediate combining-chamber, of the annular steam `chamberand the steam-nozzles, as j', leading from the stea1neh amber to thecombiningchambcr, each nozzle having an adjustable valve, allconstructed and arranged substantially as stated.

4.' The air-injector casing, constructed substantially as described,having bell-mouthed ends and enlarged central combining-chamber, theannular steam-chamber surrounding said casing and integral therewith,the series of inclined j et-nozzles leading from th e'steam-chainber,and the series of valves, one for each nozzle, having screw-threaded.stems which pass through the steam-chamber, and may be oper ated fromthe outside to open or close the jetnozzles, all in combination,substantially as stated. Y

5. The method of producing air-currents, which consists in drawing acolumn of air into a tube by means of controllable separate steamjetsforced into said tube in an inclined direction, permit-ting the steamand air to expand and mix in a chamber of enlarged area, and thenforcing out the mixed current through a reduced aperture, substantiallyas described.

In testimony whereof I affix my signature in presence of two witnesses.

PAUL H. GRIMM.

Witnesses HENRY Davis, ALFRED Sarrrn.

